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Finding the Fourth Proportional to 318,852,766.20, 477,978,218.10 and 173,071,428.60

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Solution

The fourth proportional to 318,852,766.20, 477,978,218.10 and 173,071,428.60 is: 259,443,799.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,852,766.20 : 477,978,218.10 = 173,071,428.60 : x
  2. Step 2: Convert to fraction form
    318,852,766.20/477,978,218.10 = 173,071,428.60/x
  3. Step 3: Cross multiply
    318,852,766.20x = 477,978,218.10 × 173,071,428.60
  4. Step 4: Simplify right side
    318,852,766.20x = 82,724,373,046,249,376
  5. Step 5: Solve for x
    x = 82,724,373,046,249,376/318,852,766.20
  6. Step 6: Final answer
    x = 259,443,799.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.